Different types of electrode configuration can be drawn using a conducting ink pen on semi conductive studied. These can be transcribed onto white grid paper, which provides reproducibility of results and can be used many times. Kit consists of one cork-board base, 25 semi-conductive black paper sheets with a 20 X 25cm grid, a conducting ink pen, 4 connecting leads with crocodile clips, one template for drawing different shapes of electrodes, and push pins. With instructions.